Talking-machine.



S.B AUM. TALKING MACHINE. APPLICATION FILED OCT. 5. i917.

1 2%,8 Patented Nov. 19, 1918 3 SHEETS-SHEET I.

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s. BAUM.

TALKING MACHINE.

APPLICATION FILED OCT. 5. 1917.

Patented Nov. 19, 1918.

3 SHEETS-SHEET 2.

s. BAUM. TALKING MACHINE. APPLICATION FILED OCT. 5.1917.

Patented Nov. 1%, 1918.

3 SHEET$SHEET 1-3.

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SHULAB BAUM, 0F UTICA, NEW YORK, ASSIGNOR TO THE CENTURY CABINET COM-IPANY, OF UTICA, NEW YORK, A CORPORATION OF NEW YORK.

TALKING-MACHINE.

Ezlpeeatflon of Eetters latent.

Patented Nov. 19, 191%.

Application filed October 5, 1817. Serial No. 194,971.

One object of my invention is a device in which the tone arm has a freevertical and horizontal movement.

Another object of my invention is a'device in which the moving parts ofthe tone arm are subjected to a minimum of frictional wear.

Another object of my invention is a device in which the stylus may beremoved from,

and introduced into, the sound groove of a record with a minimum dangerof injuring the undulations therein.

Another object of my invention is a device in which the horizontal andvertical movements of the tone arm are limited.

In the operation of talking machines, it is essential that the tone armcarrying the sound box and the stylus have free and unrestrictedhorizontal and vertical movements in order that the stylus may correctlyfollow the sound undulations in the sound groove. This can be obtainedonly by reducing the frictional movement to a minimum and by obviatingthe inherent weight of this portion of the machine. v As experience hasshown that the least in- -jurious effect is produced upon the soundundulations by removing, or inserting, the stylus during the revolutionof the record. it is essential that the stylus be removed, or inserted,in such a direction and in such a manner that the point of the styluswill not mar or scratch the undulations at their point of contact withthe stylus during this operation.

It is further essential in machines of this character that it bepossible to remove the stylus from the sound groove and then swing itaway from the record in order to remove or replace the record upon theturntable, and to maintain the tone arm from descending too far andinjuring the stylus and sound box by the contact of the stylus with somepart of the machine.

All of these essentials of a correct and perfect operation of a machineof the character described is accompanied by the device of my invention.

In the accompanying drawings illustrating one form of the device of myinvention, similar parts are indicated by similar numerals.

Figure 1 is a side plan View of one form of my device, the dotted linesindicating the tone arm in a raised position.

Fig. 2 is a top plan View of Fig. 1, the dotted lines indlcating thetone arm in a horizontal revolved position.

Fig. 3 is a broken side view of the tone arm, with parts broken away andparts shown in cross-section.

Fig. 4 is a cross-section through the line 44: of Fig. 3.

Fig. 5' is a cross-section through the line 5-5 of Fig. 3.

Fig. 6 is a cross-section similar to Fig. 5, the tone arm being in therevolved position indicated by the dotted lines in Fig. 2.

Fig. 7 is a cross-section through the line 7-7 of Fig. 3.

Fig. 8 is a cross-section through the line 88 of Fig. 7. I

Fig. 9 is a broken development of the ball cage.

The particular form of the device of.my invention illustrated in thedrawings comprises an annular base 10, fixedly attached to the motorboard 11 by means of the screws 12, 12. The interior of the base 10 hasthe annular semi-spherical recess 13, which acts with the annularsemi-spherical recess 14 of the revoluble collar 15 as a ball race. Thecollar 15 is revoluble within the base 10 and is held in revolublecondition therewith by the balls 16, 16 16-within the ball race. A.split fiat ring 1? is inserted between the base 10 and the revolublecollar 15 and has within it three'equi-distant holes or openings 18, 18,18 large enough for the insertion of the balls 16, 16, 16, so that whenthe balls 16, 16, 16 are in place within the device they extend throughthe openings 18, 18, 18 into the ball race formed by the recesses 13 and14:. In this manner the balls 16, 16, 16 have free movement around theball race and are kept equi-distant from each" other by the ring 17 tilliii

-hoqk 23 connected to the tone arm 19 with the-hook 24- connected withthe collar small flange plate 25, having; an indentation 28 at itsrevoluble extremity to lit into the hole 26 of the base 10, is pivotallyattached to the base 10 by means or" the screw 27. The hole 28 issulliciently large to allow of the passage therethrough of a ball 16,and opens into the ball race. The collar 15 is cut away at 29 andcarries the inwardly extended lug 30 which acts as a step for thedownward movement of the tone arm L). The hook acts as a stop for theupward movement of the tone arm 19. The tone arm ca ries the soundbox 31which in turn carries the stylus 32 capable of abutment upon the record33 carried by the turn-table 34.

i The method of assembling the device as follows:

The tone arm 19 is pivotally attached to the collar 15 by means of thepivot screws 20, 20. The split ring '1? is then inserted within the base10 and the collar 15 inserted therein. The collar 15 and the ring 17 arethen revolved until one of the holes 18, 18 is opposite the hole 26 anda ball 16 inserted, the collar 15 and the ring 17 are further revolveduntil the next hole 18 is presented to the hole 26 and a ball 16inserted, the same operation being repeated for the insertion of thethird ball, thus locking the collar to the base '10 by means of theballs l6, l3 withii'a the ball race. The ring 1? is then revolved untilthe split opening therein and the opening 25 of the collar 15 areopposite the screw 27 which is then screwed in, the ring 17 having beenrevolved over the opening, 29 to prevent the escape of the balls 16, 16,16. The screw 27 thus projects inwardly and limits the revolublemovement oi the collar 15 to the length of the cut away portion 29 andthe ring 17 to the length of its split opening.

The operation of the device is as follows Assuming that the stylus 32 isupon the record 33 as shown in Figs.- 1 and 2 and the turn-table 3% andthe record 33 revolving. In order that the stylus, may follow theundulations of the sound groove the tone arm 19 is capable of verticalmovement by its pivotal movement upon the pivots 20, 20, the weight of.the tonearm being counter-balanced by the action of the spring 22. Asthe pivots 20, 20 are practically in a horizontal plane with the pointof the stylus, it is evi. dent that the movement at the pivotal pointWlll be less than if the pivots were placed above such a horizontalplane in order to produce the necessary vertical movement of ,sea

the stylus, thus reducing the friction and the Wearing away of themoving members, and

further that the tone arm is much more evenly balanced by such aconstruction than when the pivotal point is above the stylus.

During the revolution of the record it is essential that the tone armhave a free horizontal movement in. order that it may follow the soundgrooves, and in. my device, as illus trated, this is accomplished by thethree point ball movement of theballs 16, 16, 16 Within the ball race,friction being reduced to a minimum by the equi-distant separation ofthe balls thus obtaining a minimum amount of frictional. content.

When it .is desired to remove the stylus from the record, the tone armis raised upwardly, as shown in dotted lines in Fig. 1, until the bottomrearward portion. of the tone arm strikes the lower extension of thebook 24: which thus acts as a stop. As the pivotal point of the tone armis in practical ly a horizontal plane witlnthe point of the v stylus itis evident that the stylus will be removed from the sound undulations inpractically a straight vertical direction, thus reducing to a minimumthe danger of injuring the undulations in the revolving record. Thisdirect upward. removal of the stylus from the-record can not beaccomplished when the pivotal. point of the tone arm is above thestylus, as the are of movement will not give such a line of removal.

When the stylus is removed, the tone arm 19 is revolved into theposition. shown. in 1 the dotted lines of Fig. 2 and allowed to descend,the bottom. forward portion oil the tone ari'n. striking the lug 30which. thus acts as a stop.

I do not limit n ysclf to the particular size, shape, number orarrangement of parts as described and shown all of which may be variedwithout going beyond the scope of my invention as d ribed and claimed,

What I claim is 1. In a talking machine, in combination, a base, atonearm carrying a sound boX and a stylus, a split collar between the tonearm and the base, said collar being revoluble with the tone arm andwithin the base, a ball race within the collar and the base, a splitring between the collar and the base, holes within the ring, a ballwithin each hole of the ring and extending into the ball race, pivotalmeans connecting the tone arm and the 001- lar allowing a verticalpivotal movement of the tone arm, means for limiting the horizon tal.movement of the tone arm, means for limiting the vertical movement ofthe tone arm, and means for inserting the balls into the holes of thering, and the ball race'exteriorly of the base.

2. In a talking machine, in combination, a base, a tone arm carrying asound box and a stylus, a split collar between the tone arm 18% the tonearm and within the base, a ball race within the collar and the base, asplit ring between the collar and the base, holes within the'ring, aball within each hole of the ring and extending into the ball race,pivotal means'connecting the tone arm and the collar allowing a verticalpivotal movement of the tone arm, means for limiting the horizontalmovement of the tone arm, means for limiting the vertical movement ofthe tone arm,

the means for allowing the movement of the tone arm being in anapproximate horizontal plane with the point of the stylus, means forinserting the balls into the holes of the ring 1 and the ball-raceexternally of the base and means for preventing the accidental remova ofthe balls from the ball race.

Signed at New York in the county of New York and State of New York this3rd day of 2 October, 1917.

' SHULAB BAUM.

